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This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A309868 Number of uniform hypergraphs on n unlabeled nodes with at least one (possibly empty) hyperedge.

Table of values

n a(n)
0 1
1 2
2 4
3 8
4 20
5 78
6 2459
7 14028740
8 29284932080025185
9 468863491068204454517854447175206
10 1994324729204021501147398087008429477142243091610827370319897909501551

List of values

[1, 2, 4, 8, 20, 78, 2459, 14028740, 29284932080025185, 468863491068204454517854447175206, 1994324729204021501147398087008429477142243091610827370319897909501551]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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